In economics, small changes in rules can lead to large changes in outcomes.

晏子春秋

"Sometimes the hardest thing and the right thing are the same."

Mathematics knows no races or geographic boundaries; for mathematics, the cultural world is one country.

幸福的关键是感恩。

The founders of a new colony, whatever Utopia of human virtue and happiness they might originally project, have invariably recognized it among their earliest practical necessities to allot a portion of the virgin soil as a cemetery, and another portion as the site of a prison.

恐惧是世界上最强大的武器。